Answer the following questions about the function whose derivative is Freqmew). a. What are the critical points off? b. On what intervals is f increasing or decreasing? c. At what points: if any: does f assume local maximum and minimum values? The critical points of fare x = 4. i]. [Simplify your answer. Use a comma to separate answers as needed.) The function fis increasing on the suhintewalts} D and decreasing on the suhintewalts} E. [Type your answer in interval notation. Use a comma to separate answers as needed.)